Rhythmic Auditory Stimulation System Gerard Duff 17 th of April 2008

Today's agenda Project Spec Research Initial Planning MP3 Player Stride Rate Project Summary Questions

Project Spec Music Therapy is used in neurologic rehabilitation. Studies have shown that the effects of RAS on Parkinson's disease, improves stride length and stride-to-stride variability Design a pc based music system that will play back music in rhythm to the users ideal stride frequency.

Research Audio files Find a song with a suitable tempo Hard to find songs Nice to listen to Synthesized music Make up song Easy to change tempo Hard to find nice songs

Initial Planning Accelerometer: Used to detect leg movements HyperTerminal: Accelerometer used Bluetooth to connect with pc and send raw data to it. Mp3 Player: User input stride rate and audio file speed was adjusted to match the stride rate. Matlab: Interfaced with HyperTerminal, received raw data values and calculated the stride rate

Main Program Chose a programming language Three main functions –Find Stride Rate –MP3 player –Metronome player

MP3 Player Designing GUI –Ease of use –Display key information Basic MP3 player capabilities –Add songs –Play, stop, skip Help Function

Original Tempo Matlab code –Too many samples required Mixmeister –Updates id3 tag –Fast

Changing Tempo Media rate Can change speed sufficiently without affecting pitch

Metronome Provide a metronome function for testing Time constraints on project Gmans guitar metronome

Stride Rate communicated with the pc via bluetooth Interfaced using a HyperTerminal

Calibrating Accelerometer y and z axis were deactivated 3.6 g was a sufficient threshold

Using Matlab Fopen,fprintf, fscanf MatLab.Execute(“.”)

Project Summary Overall I completed –mp3 player –metronome –Started accelerometer Developed a system from scratch using a new language Future work…

Thanks

Demonstration

Questions?

Thanks